A detection device and detection method of soft magnetic Curie temperature

Abstract

The present invention discloses a detection device for soft magnetic Curie temperature and a detection method thereof, comprising a container, a heating device, a supporting assembly and a testing assembly, a temperature sensor, and a controller; the supporting assembly is used to support a soft magnetic body and immerse the soft magnetic body in the liquid of the container, and the testing assembly comprises a vertically arranged sliding rod, a second hard magnet slidably connected to the sliding rod, a first hard magnet arranged on the sliding rod, and a connecting circuit arranged on the first hard magnet. The detection device for soft magnetic Curie temperature provided by the present invention can automatically detect the Curie temperature value of the soft magnetic body with high accuracy, and the operator does not need to spend a lot of energy and time on continuous observation, thereby eliminating the error of human reading.

Description

Technical Field

[0001] The invention relates to the field of material performance detection, and in particular to a detection device and a detection method for soft magnetic Curie temperature. Background Art

[0002] Soft magnetic materials are widely used in electrical equipment and electronic and electrical equipment. The Curie temperature characteristics of soft magnetic materials are used to produce temperature control components. In order to control the product quality of temperature control components, the Curie temperature of the soft magnets in the temperature control components needs to be tested after production, so as to determine whether the Curie temperature value of the soft magnets is within the qualified range. The conventional detection method is to clamp the soft magnets and hard magnets with special trays respectively, with springs between the trays. The soft magnets and hard magnets are attracted together, and the trays compress the springs and place them together in an oil tank for heating. When the Curie temperature is reached, the magnetic permeability of the soft magnets drops rapidly, and the springs pop open. Then the oil temperature at this time (i.e., the Curie temperature value of the soft magnets) is observed visually. The test accuracy of this method is low, and human behavior has a great impact on the test accuracy. In addition, the shapes and sizes of the soft magnets used in different products vary greatly, and different tray fixtures need to be made, which is cumbersome.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a detection device and method for the Curie temperature of soft magnets, aiming to facilitate the fixation of soft magnets, automatically detect the Curie temperature value of soft magnets, and improve the test accuracy.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for detecting the Curie temperature of a soft magnet comprises a container for loading a liquid, a heating device for heating the container, a supporting assembly and a testing assembly capable of extending into an inner cavity of the container, a temperature sensor for detecting the temperature of the liquid in the container, and a controller; the supporting assembly is used to support a soft magnet and immerse the soft magnet in the liquid in the container, the testing assembly comprises a vertically arranged sliding bar, a second hard magnet slidably connected to the sliding bar, a first hard magnet arranged on the sliding bar, and a connecting circuit arranged on the first hard magnet; the second hard magnet can be attracted to the soft magnet, and the soft magnet will eliminate the magnetic attraction to the second hard magnet at a preset temperature, so that the second hard magnet and the first hard magnet are attracted to each other to connect the connecting circuit; the connecting circuit and the temperature sensor are both electrically connected to the controller.

[0007] The connection circuit includes a first electrode and a second electrode arranged on a first hard magnet, a conductive layer is provided on the end surface of the second hard magnet facing the first hard magnet, and the first electrode and the second electrode can be electrically connected through the conductive layer; the first electrode and the second electrode are electrically connected to the controller respectively.

[0008] The sliding rod is provided with a first positioning platform, and the bottom surface of the first positioning platform is provided with positioning protrusions corresponding to the first electrode and the second electrode. The first electrode and the second electrode are both provided with limiting steps, and a spring is provided between each limiting step and the positioning protrusion. The first hard magnet is provided with a mounting hole for the first electrode and the second electrode to pass through, and the first electrode and the second electrode are slidably connected to the corresponding mounting holes, and the spring is used to push the limiting step to press against the first hard magnet.

[0009] The first hard magnet is provided with a first center hole, the second hard magnet is provided with a second center hole, the sliding rod passes through the first center hole and the second center hole in sequence from top to bottom, the sliding rod is provided with a first limit member and a second limit member for respectively limiting the movable travel of the first hard magnet and the second hard magnet, and the bottom of the first hard magnet and the second hard magnet are respectively provided with a first groove and a second groove for accommodating the first limit member and the second limit member.

[0010] The supporting assembly includes a base, a vertical plate arranged on the base, a cantilever arranged on the vertical plate, and a support plate that can move up and down relative to the cantilever; the support plate includes a connecting part and a supporting part, and the supporting part is connected to the cantilever through the connecting part; the supporting part is used to support the soft magnetic body; the heating device is arranged on the base.

[0011] The connecting part and the supporting part are connected to form an L shape. The connecting part can move vertically relative to the cantilever. The cantilever is provided with a guide groove slidably connected to the connecting part. The cantilever is provided with a locking screw hole. A locking screw is screwed into the locking screw hole to fix the connecting part on the cantilever.

[0012] A mounting groove is provided on the free end of the cantilever, a second positioning platform is provided on the top of the slide bar, and the slide bar is embedded in the mounting groove so that the second positioning platform is pressed against the cantilever.

[0013] The temperature sensor is fixed on the supporting part, and the temperature sensing probe of the temperature sensor can contact with the liquid in the container to measure the temperature.

[0014] A touch screen is provided on the vertical plate, and the touch screen and the heating device are electrically connected to the controller respectively.

[0015] The present invention accordingly provides a detection method for a detection device of soft magnetic Curie temperature, the detection method comprising the following steps:

[0016] SOO1, inject a proper amount of liquid into the container, place the container on the heating device, the cantilever is located above the container, and the supporting part of the support plate is immersed below the liquid level of the container;

[0017] SOO2, placing a soft magnet at the bottom of the slide bar so that the second hard magnet and the soft magnet attract each other;

[0018] S003, installing the test assembly on the cantilever, and adjusting the height of the support plate so that the support portion supports the soft magnet and the soft magnet is completely immersed in the liquid;

[0019] S004, setting the heating temperature of the heating device through the touch screen, and the heating device starts to heat the liquid in the container;

[0020] S005, when the temperature of the liquid reaches the Curie temperature of the soft magnetic body, the magnetism of the soft magnetic body disappears and the connection circuit is connected;

[0021] S006, when the controller detects that the connection circuit is connected, the controller obtains the sensed temperature value of the temperature sensor at this time and displays the sensed temperature value on the touch screen, wherein the sensed temperature value is the Curie temperature value of the soft magnet.

[0022] Beneficial effects:

[0023] The present invention provides a detection device and method for the Curie temperature of a soft magnet, which have the following advantages over the prior art: (1) The second hard magnet in the test assembly can start testing immediately after absorbing the soft magnet, and the test assembly does not need to use a fixture to clamp the soft magnet. Therefore, the detection device can be used to detect soft magnets of various shapes and sizes, greatly improving the applicability and detection efficiency of the detection device. (2) The supporting assembly supports the soft magnet, which, on the one hand, prevents the soft magnet from sinking to the bottom wall of the container after demagnetization, and on the other hand, when the soft magnet has magnetism, the second hard magnet in the test assembly can be re-attracted with the soft magnet, making it easy to take the soft magnet out of the container. (3) When the temperature of the liquid reaches the Curie temperature of the soft magnet, the magnetism of the soft magnet disappears, and the attraction between the soft magnet and the second hard magnet is lost. The second hard magnet moves upward instantly under the magnetic attraction of the first hard magnet, and the connection circuit is connected. When the controller detects that the connection circuit is connected, the controller obtains the induced temperature value of the temperature sensor at this time as the Curie temperature of the soft magnet, so that the Curie temperature of the soft magnet can be automatically detected with high accuracy. The operator does not need to spend a lot of energy and time on continuous observation, thereby eliminating the error of human reading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of the detection device provided by the present invention.

[0025] Figure 2 A three-dimensional diagram of a test assembly in the detection device provided by the present invention.

[0026] Figure 3 A cross-sectional view of a test assembly in the detection device provided by the present invention.

[0027] Figure 4 A three-dimensional diagram of a slide bar in the detection device provided by the present invention.

[0028] Figure 5 This is a three-dimensional diagram of the first hard magnet in the detection device provided by the present invention.

[0029] Figure 6 This is a three-dimensional diagram of the second hard magnet in the detection device provided by the present invention.

[0030] Figure 7 A three-dimensional diagram of a supporting assembly in the detection device provided by the present invention. DETAILED DESCRIPTION

[0031] The present invention provides a device for detecting the Curie temperature of a soft magnetic material. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of protection of the present invention.

[0032] See also Figure 1-Figure 7 The present invention provides a device for detecting the Curie temperature of a soft magnet, comprising a container 1 for loading a liquid, a heating device 2 for heating the container, a supporting assembly 3 and a testing assembly 4 capable of extending into the inner cavity of the container 1, a temperature sensor 5 for detecting the temperature of the liquid in the container, and a controller (not visible in the figure); the supporting assembly 3 is used to support a soft magnet 6 and immerse the soft magnet 6 in the liquid of the container 1, the testing assembly 4 comprises a vertically arranged sliding rod 40, a second hard magnet 42 slidably connected to the sliding rod, a first hard magnet 41 arranged on the sliding rod, and a connecting circuit 43 arranged on the first hard magnet; the first hard magnet 41 is located above the second hard magnet 42, the second hard magnet 42 can be attracted to the soft magnet 6, the soft magnet 6 will eliminate the magnetic attraction with the second hard magnet 42 at a preset temperature, so that the second hard magnet 42 and the first hard magnet 41 are attracted to each other so that the connecting circuit 43 is connected; the connecting circuit 43 and the temperature sensor 5 are both electrically connected to the controller.

[0033] During the test, firstly inject appropriate liquid (such as oil, water, etc.) into the container 1, then place the soft magnet 6 at the bottom of the slide bar 40, and the bottom of the second hard magnet 42 absorbs the soft magnet 6 to be tested. At this time, the upper side of the second hard magnet 42 is subjected to the magnetic attraction force of the first hard magnet 41, and the lower side of the second hard magnet 42 is subjected to the magnetic attraction force of the second hard magnet 42; since the magnetic attraction force between the second hard magnet 42 and the soft magnet 6 is greater than the magnetic attraction force between the first hard magnet 41 and the second hard magnet 42, the second hard magnet 42 and the soft magnet 6 are attracted together. Compared with the existing detection device, the test can be started immediately after the second hard magnet absorbs the soft magnet, and the test assembly 4 does not need to use a fixture to clamp the soft magnet 6. Therefore, the detection device can be used to detect soft magnets 6 of various shapes and sizes, which greatly improves the applicability of the detection device. Then, the test assembly 4 is placed in the inner cavity of the container so that the second hard magnet 42 is completely immersed in the liquid; then, the support assembly 3 is adjusted so that the support assembly 3 supports the soft magnet 6, on the one hand, to prevent the soft magnet 6 from sinking to the bottom wall of the container after demagnetization, and on the other hand, when the soft magnet has magnetism, the second hard magnet 42 in the test assembly 4 can be attracted to the soft magnet 6 again, so that the soft magnet 6 can be taken out of the container 1. Finally, the liquid in the container 1 is heated, and the soft magnet is heated and heated by the heat transfer of the liquid, and the temperature sensor detects the temperature of the liquid in real time. When the temperature of the liquid reaches the Curie temperature value of the soft magnet 6, the magnetism of the soft magnet 6 disappears, and the attraction between the soft magnet 6 and the second hard magnet 42 is lost. The second hard magnet 42 moves upward instantly under the magnetic attraction of the first hard magnet 41, and the connection circuit 43 is connected; when the controller detects that the connection circuit 43 is connected, the controller obtains the induced temperature value of the temperature sensor at this time, and the induced temperature value is used as the Curie temperature value of the soft magnet. Compared with the prior art, the detection device provided by the present invention is easy to operate, can automatically detect the Curie temperature value of the soft magnetic body with high accuracy, and the operator does not need to spend a lot of energy and time on continuous observation, thereby eliminating the error of human reading.

[0034] In one embodiment, in order to prevent the materials of the container 1 and the supporting assembly 3 from affecting the detection effect of the soft magnetic body, the container 1 is a glass cup; the parts in the supporting assembly 3 are made of non-magnetic metal materials; the heating device 2 is an electric furnace; and the controller is a single-chip microcomputer.

[0035] For details, please refer to Figure 2 and Figure 3The connection circuit 43 includes a first electrode 43.1 and a second electrode 43.2 arranged on the first hard magnet 41, and a conductive layer (not visible in the figure) is provided on the end surface of the second hard magnet 42 facing the first hard magnet 41, and the first electrode 43.1 and the second electrode 43.2 can be connected through the conductive layer; the first hard magnet 41 is provided with a mounting hole 41.1 for the first electrode 43.1 and the second electrode 43.2 to pass through, and the first electrode 43.1 and the second electrode 43.2 are vertically inserted into the corresponding mounting holes 41.1, and the first electrode 43.1 and the second electrode 43.2 are electrically connected to the controller respectively. When the connection circuit 43 is not turned on, the bottom ends of the first electrode 43.1 and the second electrode 43.2 are lower than the bottom surface of the first hard magnet 41, and the bottom ends of the first electrode 43.1 and the second electrode 43.2 are rounded. Such a setting can reduce the contact area between the electrode and the second hard magnet 42 and prevent the electrode from sticking to the second hard magnet 42.

[0036] Here, in order to ensure that the first electrode 43.1 and the second electrode 43.2 cannot be electrically connected through the first hard magnet 41 and further improve the insulation of the first hard magnet 41, insulating oil is sprayed on the outer surface and the mounting hole of the first hard magnet 41. The conductive layer is preferably an electroplated layer disposed on the surface of the second hard magnet 42.

[0037] In one embodiment, see Figure 2 and Figure 3 , the sliding rod 40 is provided with a first positioning platform 45.1, and a positioning protrusion 46 corresponding to the first electrode 43.1 and the second electrode 43.2 is provided on the bottom surface of the first positioning platform 45.1, and the positioning protrusion 46 is made of insulating material to prevent the first electrode 43.1 and the second electrode 43.2 from being connected through the first positioning platform 45; the first electrode 43.1 and the second electrode 43.2 are both provided with a limiting step 43.3, and a spring 47 is provided between each limiting step 43.3 and the positioning protrusion 46, one end of the spring 47 is sleeved on the electrode, and the other end of the spring 47 is sleeved on the positioning protrusion 46, and the spring 47 pushes the limiting step 43.3 to press against the first hard magnet 41, and the spring 47 provides the first electrode 43.1 and the second electrode 43.2 with contact pressure with the first hard magnet 41, and the first electrode 43.1 and the second electrode 43.2 are slidably connected with the corresponding mounting hole 41.1.

[0038] When the second hard magnet 42 and the first hard magnet 41 are attracted to each other, the second hard magnet 42 pushes the first electrode 43.1 and the second electrode 43.2 upward, so that the first electrode 43.1 and the second electrode 43.2 slide upward, and the bottom ends of the first electrode 43.1 and the second electrode 43.2 are always pressed against the conductive layer under the action of the spring, ensuring the stability of the connection circuit. In addition, the spring also provides a buffering force to the first electrode and the second electrode to prevent the bottom ends of the first electrode and the second electrode from having a rigid body contact with the second hard magnet, causing greater wear.

[0039] Preferably, see Figure 3-Figure 6 , the first hard magnet 41 is provided with a first center hole 41.2, the second hard magnet 42 is provided with a second center hole 42.1, the slide bar 40 passes through the first center hole 41.2 and the second center hole 42.1 from top to bottom in sequence, the slide bar 40 is provided with a first limiter 48 and a second limiter 49 for limiting the movable travel of the first hard magnet 41 and the second hard magnet 42 respectively, and the bottom of the first hard magnet 41 and the second hard magnet 42 are provided with a first groove 48.1 and a second groove 49.1 for accommodating the first limiter 48 and the second limiter 49 respectively. Here, the first limiter 48 is hidden in the first groove 48.1, which can prevent the first limiter 48 from interfering with the attraction of the first hard magnet 41 and the second hard magnet 42; the second limiter 49 is hidden in the second groove 49.1, which can prevent the first limiter 48 from interfering with the attraction of the second hard magnet 42 and the soft magnet 6.

[0040] Preferably, see Figure 3 and Figure 4 As shown, the first limit member 48 and the second limit member 49 are preferably retaining springs, and the slide rod is provided with a first slot 40.1 for installing the first limit member 48 and a second slot 40.2 for installing the second limit member 49. When the first hard magnet 41 and the second hard magnet 42 are inserted into the slide rod 40, the first limit member 48 is correspondingly snapped into the first slot 40.1, and the second limit member 49 is correspondingly snapped into the second slot 40.2, and the assembly is completed, which is convenient and quick; thereby, the activity range of the first hard magnet is limited between the first positioning platform 45.1 and the first limit member 48, and the activity range of the second hard magnet 42 is limited between the first limit member 48 and the second limit member 49.

[0041] Preferably, see Figure 7As shown, the support assembly 3 includes a base 31, a vertical plate 32 arranged on the base, a cantilever 33 arranged on the vertical plate, and a support plate 34 that can move up and down relative to the cantilever 33; the support plate 34 includes a connecting portion 34.1 and a supporting portion 34.2, and the supporting portion 34.2 is connected to the cantilever 33 through the connecting portion 34.1; the supporting portion 34.2 is used to support the soft magnetic body 6; the heating device 2 is arranged on the base 31. In order to improve the functionality of the support assembly, the support assembly 3 not only supports the soft magnetic body 6, but also supports the test assembly 4, and the test assembly is installed on the cantilever.

[0042] Preferably, the connection part 34.1 and the supporting part 34.2 are connected to form an L shape, the connection part can move vertically relative to the cantilever 33, the cantilever 33 is provided with a guide groove 33.1 slidably connected to the connection part 34.1, the cantilever 33 is provided with a locking screw hole (not shown in the figure), a locking screw 35 is screwed into the locking screw hole, so that the connection part 34.1 is fixed to the cantilever 33. Here, in order to prevent the connection part 34.1 from being separated from the guide groove 33.1, a limit pin 36 is provided on the connection part 34.1.

[0043] During actual operation, first loosen the locking screw 35, adjust the height of the support plate 34 so that the supporting portion 34.2 of the support plate 34 supports the soft magnetic body 6, and then tighten the locking screw 35. On the one hand, the support plate 34 prevents the soft magnetic body 6 from sinking to the bottom wall of the container after demagnetization. On the other hand, when the soft magnetic body is magnetic, the second hard magnet 42 in the test component 4 can be re-attracted with the soft magnetic body 6, making it easy to remove the soft magnetic body 6 from the container 1.

[0044] Preferably, a mounting groove 33.2 is provided on the free end of the cantilever 33, and a second positioning platform 45.2 is provided on the top of the slide bar 40. When assembling the test assembly, the slide bar 40 only needs to be directly embedded in the mounting groove 33.2 so that the second positioning platform 45.2 is pressed against the cantilever 33, and the test assembly can be hung and disassembled quickly.

[0045] Preferably, the temperature sensor 5 is fixed on the supporting part 34.2, and the supporting part 34.2 is provided with a socket 51, and the temperature sensing probe of the temperature sensor passes through the socket to perform contact temperature measurement on the liquid below the supporting part.

[0046] Preferably, a touch screen 8 is provided on the vertical plate 32, and the touch screen 8 and the heating device 2 are electrically connected to the controller respectively. The user sets the maximum heating temperature of the heating device through the touch screen, and when the temperature sensor detects the maximum heating temperature, the temperature sensor feeds back a signal to the controller to stop the heating device from heating. Through the touch screen, the user can start and stop the heating device by controlling the controller, and the controller will directly transmit the Curie temperature of the soft magnetic body to the touch screen, and the user can intuitively know the Curie temperature of the soft magnetic body through the touch screen.

[0047] With respect to the above-mentioned soft magnetic Curie temperature detection device, the present invention also provides a detection method comprising the following steps:

[0048] SOO1, inject a proper amount of liquid into the container, place the container on the heating device, the cantilever is located above the container, and the supporting part of the support plate is immersed below the liquid level of the container;

[0049] SOO2, placing the soft magnet at the bottom of the slide bar so that the second hard magnet 42 and the soft magnet are attracted to each other;

[0050] S003, installing the test assembly on the cantilever, and adjusting the height of the support plate so that the support portion supports the soft magnet and the soft magnet is completely immersed in the liquid;

[0051] S004, setting the heating temperature of the heating device through the touch screen, and the heating device starts to heat the liquid in the container;

[0052] S005, when the temperature of the liquid reaches the Curie temperature of the soft magnet, the magnetism of the soft magnet disappears, and the attraction between the soft magnet and the second hard magnet 42 is lost. The second hard magnet 42 moves upward under the magnetic attraction of the first hard magnet 41, so that the first electrode 43.1 and the second electrode 43.2 are pressed against the conductive layer on the second hard magnet 42, and the connection circuit is connected;

[0053] S006, when the controller detects that the connection circuit is connected, the controller obtains the sensed temperature value of the temperature sensor at this time and displays the sensed temperature value on the touch screen, wherein the sensed temperature value is the Curie temperature value of the soft magnet.

[0054] The above detection method is simple to operate. The test can be carried out after the second hard magnet in the test component is attracted to the soft magnet, which greatly saves the time of fixing the soft magnet and improves the detection efficiency. Moreover, the operator can directly obtain the Curie temperature value of the soft magnet through the touch screen without spending a lot of energy and time for continuous observation. The detection value is highly accurate and eliminates the error of human reading.

[0055] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A device for detecting the Curie temperature of a soft magnetic material, characterized in that: It includes a container for loading liquid, a heating device for heating the container, a supporting component and a testing component capable of extending into the inner cavity of the container, a temperature sensor for detecting the temperature of the liquid in the container, and a controller; the supporting component is used to support a soft magnet and immerse the soft magnet in the liquid in the container, and the testing component includes a vertically arranged sliding rod, a second hard magnet slidably connected to the sliding rod, a first hard magnet arranged on the sliding rod, and a connecting circuit arranged on the first hard magnet; the second hard magnet can be attracted to the soft magnet, and the soft magnet will eliminate the magnetic attraction with the second hard magnet at a preset temperature, so that the second hard magnet and the first hard magnet are attracted to each other to connect the connecting circuit; the connecting circuit and the temperature sensor are both electrically connected to the controller; the connecting circuit includes a first electrode and a second electrode arranged on the first hard magnet, and the second hard magnet faces the first hard magnet A conductive layer is provided on the end surface of the body, and the first electrode and the second electrode can be electrically connected through the conductive layer; the first electrode and the second electrode are electrically connected to the controller respectively; the supporting assembly includes a base, a vertical plate arranged on the base, a cantilever arranged on the vertical plate, and a support plate that can move up and down relative to the cantilever; the support plate includes a connecting part and a supporting part, and the supporting part is connected to the cantilever through the connecting part; the supporting part is used to support the soft magnetic body; the heating device is arranged on the base; the connecting part and the supporting part are connected to form an L shape, and the connecting part can move vertically relative to the cantilever, and a guide groove slidably connected to the connecting part is provided on the cantilever, and a locking screw hole is provided on the cantilever, and a locking screw is screwed into the locking screw hole to fix the connecting part on the cantilever; the temperature sensor is fixed on the supporting part, and the temperature sensing probe of the temperature sensor can contact the liquid in the container to measure the temperature.

2. The soft magnetic Curie temperature detection device according to claim 1, characterized in that: The sliding rod is provided with a first positioning platform, and the bottom surface of the first positioning platform is provided with positioning protrusions corresponding to the first electrode and the second electrode. The first electrode and the second electrode are both provided with limiting steps, and a spring is provided between each limiting step and the positioning protrusion. The first hard magnet is provided with a mounting hole for the first electrode and the second electrode to pass through, and the first electrode and the second electrode are slidably connected to the corresponding mounting holes, and the spring is used to push the limiting step to press against the first hard magnet.

3. The soft magnetic Curie temperature detection device according to claim 1, characterized in that: The first hard magnet is provided with a first center hole, the second hard magnet is provided with a second center hole, the sliding rod passes through the first center hole and the second center hole in sequence from top to bottom, the sliding rod is provided with a first limit member and a second limit member for respectively limiting the movable travel of the first hard magnet and the second hard magnet, and the bottom of the first hard magnet and the second hard magnet are respectively provided with a first groove and a second groove for accommodating the first limit member and the second limit member.

4. The soft magnetic Curie temperature detection device according to claim 1, characterized in that: A mounting groove is provided on the free end of the cantilever, a second positioning platform is provided on the top of the slide bar, and the slide bar is embedded in the mounting groove so that the second positioning platform is pressed against the cantilever.

5. The soft magnetic Curie temperature detection device according to claim 1, characterized in that: A touch screen is provided on the vertical plate, and the touch screen and the heating device are electrically connected to the controller respectively.

6. A detection method of the soft magnetic Curie temperature detection device according to claim 5, characterized in that: The detection method comprises the following steps: SOO1, inject a proper amount of liquid into the container, place the container on the heating device, the cantilever is located above the container, and the supporting part of the support plate is immersed below the liquid level of the container; SOO2, placing a soft magnet at the bottom of the slide bar so that the second hard magnet and the soft magnet attract each other; S003, installing the test assembly on the cantilever, and adjusting the height of the support plate so that the support portion supports the soft magnet and the soft magnet is completely immersed in the liquid; S004, setting the heating temperature of the heating device through the touch screen, and the heating device starts to heat the liquid in the container; S005, when the temperature of the liquid reaches the Curie temperature of the soft magnet, the magnetism of the soft magnet disappears and the connection circuit is connected; S006, when the controller detects that the connection circuit is connected, the controller obtains the sensed temperature value of the temperature sensor at this time and displays the sensed temperature value on the touch screen, wherein the sensed temperature value is the Curie temperature value of the soft magnet.

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